* Improve manual page synopsis and built-it help
 * Use full subcommand names (e.g. 'address' and 'maddress')
 * Specify when IPv4, IPv6 or both are affected
 * Add lifetimes, home and nodad
 * Remove any remaining excess spaces

Commit 43d29f78 substantially improves generated ip-address.8 instead of
ip-address.8.in and commit e419f2d6 removes the generated one losing the
improvements entirely. This commit recovers the lost changes, adapts
them to the current manual page and adds more man page and help
improvements.

Original commit by: Kenyon Ralph <kenyon@kenyonralph.com>